For the H atom,which of the following is the | vedclass

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(B) For a single-electron species like the $H$ atom,the energy of an orbital depends only on the principal quantum number $(n)$.Since all orbitals wit

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$3s = 3p = 3d < 4s = 4p = 4d = 4f$

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(B) For a single-electron species like the $H$ atom,the energy of an orbital depends only on the principal quantum number $(n)$.Since all orbitals with the same $n$ value have the same energy,they are degenerate.For $n = 3$,the orbitals are $3s, 3p, 3d$,and they all have the same energy.For $n = 4$,the orbitals are $4s, 4p, 4d, 4f$,and they all have the same energy.Since $n = 3 Therefore,the correct order is $3s = 3p = 3d < 4s = 4p = 4d = 4f$.

List-$I$	List-$II$
$(1)$ Exclusion Principle	$(A)$ Hund
$(2)$ Multiplicity Rule	$(B)$ Heisenberg
$(3)$ Uncertainty Principle	$(C)$ Einstein
$(4)$ Quantum Theory	$(D)$ Planck
	$(E)$ Pauli

For the $H$ atom,which of the following is the correct order of energy?

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